Đề thi online - Ôn tập học kì II - Có lời giải chi...

A \({150^0}\)

B \( - {150^0}\)

C \({112^0}50'\)

D \({120^0}\)

A \(x < {{20} \over {23}}\)

B \(x > {{10} \over {23}}\)

C \(x \in R\)

D \(x > {{20} \over {23}}\)

A \(\sqrt {x + 3}  < x\)

B \(\left| x \right| < 2\)

C \((x - 1)(x - 2) > 0\)

D \({x \over {1 - x}} + {{1 - x} \over x} < 0\)

A \(\left( {4; - 3} \right)\)

B \(\left( { - 3;4} \right)\)

C \(\left( { - 3; - 4} \right)\)         

D \(\left( {4;3} \right)\)

A Song song.      

B Trùng nhau

C Cắt nhau nhưng không vuông góc. 

D Vuông góc.

A \(x \ne {1 \over 2}\).

B \(x \ge  - {1 \over 4}\)

C \(x \le {1 \over 2}\)      

D \(x < {1 \over 2}\)

A (I)

B (II)

C (III)

D (IV)

A \(\left\{ \matrix{  x =  - 1 + 3t \hfill \cr   y = 2t \hfill \cr}  \right.\)

B \(\left\{ \matrix{  x = 3 + 3t \hfill \cr   y =  - 6 - t \hfill \cr}  \right.\)

C \(\left\{ \matrix{  x = 3 + 3t \hfill \cr   y =  - 1 - t \hfill \cr}  \right.\)

D \(\left\{ \matrix{  x = 3 + 3t \hfill \cr   y =  - 1 + t \hfill \cr}  \right.\)

A \(\sqrt {1 - {{\sin }^2}B} \)

B \({{{b^2} + {c^2} - {a^2}} \over {2bc}}\)       

C \(\cos (A + C)\)

D \({{{a^2} + {c^2} - {b^2}} \over {2ac}}\)

A \(D = \left[ { - 5;1} \right)\)

B \(D = \left( { - 5;1} \right)\)

C \(D = \left( { - \infty ; - 5} \right] \cup \left[ {1; + \infty } \right)\)

D \(\left( { - 5;1} \right]\)

A \({{\sqrt 3 } \over 3} - 1\)

B \({{\sqrt 3 } \over 3} + 1 + \sqrt 2 \)

C \({{\sqrt 3 } \over 1} - 1 - \sqrt 2 \)

D \({{\sqrt 3 } \over 3} + 1\)

A \(\cos a = {{12} \over {13}}\)

B \(\cos a =  \pm {{12} \over {13}}\)

C \(\tan a = {{ - 5} \over {12}}\)

D \(\cot a = {{12} \over 5}\)

A \({30^0}\)

B \({45^0}\)

C \({125^0}\)      

D \({60^0}\)

A \(\left[ {2; + \infty } \right){\rm{\backslash }}\left\{ 0 \right\}\)

B \(\left( { - \infty ;{{9 - \sqrt {113} } \over 2}} \right] \cup \left[ {{{9 + \sqrt {113} } \over 2}; + \infty } \right)\)

C \(\emptyset \)

D \(\left[ {{{9 - \sqrt {113} } \over 2};{{9 + \sqrt {113} } \over 2}} \right]\)

A \(\left[ { - {1 \over 2}; + \infty } \right){\rm{\backslash }}\left\{ 2 \right\}\)

B \(\left( { - \infty ; - {1 \over 2}} \right]\)         

C \(\left( { - \infty ; - {1 \over 2}} \right] \cup \left( {2; + \infty } \right)\)

D \(\left[ { - {1 \over 2};2} \right]\)

A 0

B \(1 + \cos 2x\)

C \(1 - \sin \,x\)

D 1

A \(14\sqrt 5 \)

B \(20\)

C \(15\)

D \(16\sqrt 2 \)

A \(\left\{ \matrix{  x =  - 1 \hfill \cr   y = 5 + 2t \hfill \cr}  \right.\)

B \(\left\{ \matrix{  x =  - 1 + t \hfill \cr   y = 5 + t \hfill \cr}  \right.\)

C \(\left\{ \matrix{  x =  - 1 + t \hfill \cr   y = 3 \hfill \cr}  \right.\)

D \(\left\{ \matrix{  x =  - 1 + t \hfill \cr   y = 3 + t \hfill \cr}  \right.\)

A 0

B 64

C 32

D 1

A 3

B 6

C 9

D 8